SDR UIEA2026072400653

Service difficulty report · Battery · Boeing 74745EF

Difficulty date: July 24, 2026
Submitted: July 24, 2026
Operation: Air carrier
Aircraft: N487MC
Make and model: Boeing 74745EF
Aircraft serial: 30609
Aircraft time: 103,614 hours, 18,820 cycles
System (JASC): 3350 · Emergency Lighting
Part: Battery
Part number: 20131A
Part serial: 500987
Condition: No Test
Location: Zone 200
Stage of operation: IN
How discovered: C
Nature of condition: L
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FOUND EMERGENCY LIGHT BATTERY M5170 FUNCTION FAIL(<P>1. IAW AMM 33-51-04-902-001-001 REV 107 REPLACED EMERGENCY LIGHT BATTERY PACK (M5170) AT UPPER DECK, CONDITION CHECK NORMAL, AND PERFORMED POWER SUPPLY TEST, RESULT WAS SATISFACTORY</P>)

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